Issue #2382239 by chx: InstallerKernel is undocumented and hardwires bootstrap config storage

core/lib/Drupal/Core/Installer/InstallerKernel.php

@@ -7,10 +7,7 @@
 
 namespace Drupal\Core\Installer;
 
-use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\Core\DrupalKernel;
-use Drupal\Core\Site\Settings;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
 /**
  * Extend DrupalKernel to handle force some kernel behaviors.
@@ -19,10 +16,28 @@ class InstallerKernel extends DrupalKernel {
 
   /**
    * {@inheritdoc}
+   *
+   * @param bool $rebuild
+   *   Force a container rebuild. Unlike the parent method, this defaults to
+   *   TRUE.
    */
   protected function initializeContainer($rebuild = TRUE) {
     $container = parent::initializeContainer($rebuild);
     return $container;
   }
 
+  /**
+   * Reset the bootstrap config storage.
+   *
+   * Use this from a database driver runTasks() if the method overrides the
+   * bootstrap config storage. Normally the bootstrap config storage is not
+   * re-instantiated during a single install request. Most drivers will not
+   * need this method.
+   *
+   * @see \Drupal\Core\Database\Install\Tasks::runTasks().
+   */
+  public function resetConfigStorage() {
+    $this->configStorage = NULL;
+  }
+
 }